Quadram Quadcolor

The Quadram Quadcolor is a graphics card for IBM PC computers by Quadram Corporation, first sold in 1983.

It is a superset of the then-current CGA standard, using the same monitor standard (4-bit digital TTL RGBI monitor or NTSC composite video)[1][2][3] and providing the same pixel resolutions.

The Quadcolor has twice the memory of a standard CGA board (32k, compared to 16k),[1][2] and offers a 640 × 200 mode with two freely definable colours.

[4] If used with the Quadcolor II enhancement board, the additional memory can be used in graphics modes to double the color depth, allowing for two additional graphics modes — 320 × 200 resolution with 136 colors, or 640 × 200 resolution with 16 colors.

[2][5] This card is supported by Dr. Halo II and Turbo Pascal Graphix Toolbox.

Quadram Quadcolor I in 640 × 200 x 2 colors (aspect ratio corrected)
Quadram Quadcolor II in 320 × 200 x 136 colors (aspect ratio corrected)
Quadram Quadcolor II in 640 × 200 x 16 colors (aspect ratio corrected)